Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0f45093880db269…

MALICIOUS

PDF

61.3 KB Created: 2020-08-04 13:02:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1db363ef91bf9b8bc8138625d887f60e SHA-1: ad44b8047633c5bea91ad89382b5bc3ca99ba599 SHA-256: a0f45093880db269fbcbfbe01da1fb50a02093a5ee4ee8483b1cc68a06771bdf
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits a PDF link farm heuristic, with numerous links hosted on 'cdn.shopify.com'. The ML classifier strongly indicated maliciousness. The embedded URL in the document body also points to the malicious redirector, suggesting the primary intent is to lure users to a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/pify?keyword=%25C3%25A1cido+aspartico+pdf
    • http://files.davesartdimensions.com/uploads/1/3/1/6/131606348/vojetiborakupo.pdf
    • http://files.daynadaynehair.com/uploads/1/3/1/3/131379510/512166.pdf
    • http://files.mezohenley.co.uk/uploads/1/3/0/9/130969356/vekejalu.pdf
    • http://files.cagecommerical.com/uploads/1/3/1/6/131606546/eccdead.pdf
    • http://files.maritzavives.com/uploads/1/3/2/8/132815346/zotowelew_lotavapibo_zevubebesoden_sodagufeje.pdf
    • https://cdn.shopify.com/s/files/1/0430/0714/8185/files/9859883908.pdf
    • https://cdn.shopify.com/s/files/1/0434/3260/7900/files/57831727390.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dosodasanofesawule.pdf
    • https://cdn.shopify.com/s/files/1/0430/4227/5485/files/mogedigo.pdf
    • https://cdn.shopify.com/s/files/1/0439/5306/2043/files/lorisovopiwat.pdf
    • https://cdn.shopify.com/s/files/1/0430/7661/6346/files/weraxuxumel.pdf
    • https://cdn.shopify.com/s/files/1/0430/6268/9946/files/journeys_kindergarten.pdf
    • https://cdn.shopify.com/s/files/1/0433/0727/0297/files/20710750432.pdf
    • https://cdn.shopify.com/s/files/1/0434/3290/2806/files/27339560549.pdf
    • https://cdn.shopify.com/s/files/1/0433/8909/1998/files/gibelori.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/16175378270.pdf
    • https://cdn.shopify.com/s/files/1/0432/2505/5387/files/netitipakak.pdf
    • https://cdn.shopify.com/s/files/1/0432/5769/2320/files/windows_7_service_pack_2.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a600.bin
e9dcbe5ab5521a0738f88ad087f9330434799ca2a46e00d6589e576a46661688		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA600 4692 bytes
font_01_sfnt_off0000b5fa.bin
aab4811c2a4b92e0b7495e98eb34c73d0757eb6dd9da7b7675e121ba06b966c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB5FA 10480 bytes
font_02_sfnt_off0000d836.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD836 4324 bytes

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